20271669 has 8 divisors (see below), whose sum is σ = 29486112. Its totient is φ = 12285840.

The previous prime is 20271661. The next prime is 20271673. The reversal of 20271669 is 96617202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20271669 - 2³ = 20271661 is a prime.

It is a super-2 number, since 2×20271669² = 821881128091122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 614293 = 20271669 / (2 + 0 + 2 + 7 + 1 + 6 + 6 + 9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20271661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307114 + ... + 307179.

It is an arithmetic number, because the mean of its divisors is an integer number (3685764).

Almost surely, 2^20271669 is an apocalyptic number.

It is an amenable number.

20271669 is a deficient number, since it is larger than the sum of its proper divisors (9214443).

20271669 is a wasteful number, since it uses less digits than its factorization.

20271669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614307.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 20271669 is about 4502.4070229156. The cubic root of 20271669 is about 272.6652769487.

The spelling of 20271669 in words is "twenty million, two hundred seventy-one thousand, six hundred sixty-nine".